Improvement in traps for drains, sewers



UNITED STATEs PATENT OEEIGE.

JAMES SARGENT, OF ROCHESTER, NEV YORK.

IMPROVEMENT IN TRAPs FOR DRAINS, sEwERs, sto.

Y Specification forming part of Letters Patent No. 200,093, dated February 5, 1878; application filed January 26, 1878.

To all whom it may concern Be it known that I, JAMES SARGENT, Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Traps for Drains, Sewers, 8vo., of which the following is al speciication: I

This invention relates to an improvement in that class of devices the purpose of which is to prevent back-flow and escape of sewergases and foul'air from sewers through drain and waste pipes connected therewith.

Its object is to provide for this purpose a trap or valve adapted for application to a line of pipe already laid or at the original layingl thereof.

It consists, iirst, in a section of sewer or drain pipe, provided with an interior gate or valve, and having its inner area on the outward side of said gate circular in cross-section, while on the inward side of said gate the cross-section of said area is elliptical, whereby the current of drainage is contracted in width and rendered deeper, increasing its head so that solid matter will not be liable tolodge at or be prevented from-opening and passing the gate; second, in a section of drain-pipe,-

provided with an interior gate opening in the direction of the ow, and adapted at its inward portion for connection with a pipe for conducting air into a line drain-pipe at the rear of the gate, whereby sewer-gases and foul air are prevented from escaping from a sewer through the line of pipes leading from a house, and instead pure air is received into said drain-pipe; third, in the combination, with a section of drain-pipe, having its opposite end openings in the same longitudinal plane, and its inward portion contracted, of a gravity gate or valve, provided with separate inclined jamb or bearing, adapted for insertion and removal at will, whereby the gate may be easily removed for repair, and the construction of the whole rendered easier than if the hingebearings and jambs were cast or molded with the section; fourth, in the combination, with a drain-pipe, of a gravity gate or valve, arranged to open in the direction of the sewer, but prevented 'om opening in the opposite direction, an air-pipe leading from said drainpipe at the rear or house side of its gate, and

` 3 is an outward end view of the same.

a valve arranged in said air-pipe, and adapted of to open inwardly for the inflow of fresh air,

but prevented from opening outwardly, so that gas or foul air, which might accumulate in the drain-pipe at the rear or house side of the drain-gate, may not escape therethrough.

In the accompanying drawings, Figure l represents a vertical central section of a line of drain-pipe leading to a sewer. Fig. 2 is an inward end view of a section of drain-pipe constructed according to my invention.

11g. 4 is a section` on line .r Fig. l. Fig. 5 is a view of the gate and its bearing detached.

In the drawing, W designates a house-wall, and S the floor of a cellar. The letter A indicates a section of a drainpipe, from which a man-hole, E, opens upward. The outward portion a of this section, as shownrin Fig. 3,

and the inward portion a', has au elliptical cross-section, as shown in Fig. 2.

lB is a gate or valve, hinged to the narrow portion of the wall of an annular band or short tube, l), one end of which is beveled, as shown at d, to afford an inclined bearing, upon which the gate B, by gravity, will lie snugly against and keep the pipe-passage closed, except when the iiow of drainage forces it open in iindin g its way to the sewer. This gate and its jamb or bearing are formed separately from the section of pipe A, and afterward inserted, a re cess, b', being cut in the wall of the man-hole for the reception of the ears b of the jamb or bearing.

On the inward side of the gate the section of pipe A has a hole, c, cut in its wall, and into this hole ts the end of a pipe, C, which leads into an air-passage, C', opening above the surface of the ground, and provided with a delicately-hung gravity flap-valve, c', ar ranged to open inward, to receive and conduct fresh air to the rear of the gate B, but prevented by its jamb from opening outward, so that foul air may not escape through the pipe in case the gate B should fail to close perfectly, or, from any other cause, such air as sewer-gas should accumulate at the rear of the drain-gate. By means of this pipe C pure air is conducted into the drainpipe between the gate and the inlet end of the drain-pipe, while by the gate B sewer-gases and foul air f are preventedr i'rcnnescapingV irom'the sewer i i Y In applying my invention to a line of drain` pipe, I prefer to locate the valve-section. below the cellar-licor, under which I dig a pit of suit-` V Yable depth, and, Vafter connecting the valvesection, I wall up saidpit, as shown at ww,

Fig. l, and cover it by a suitable Vtrap-door, 1 formingapcrtion oithecellarfioonor byother suitable means. Ithns prov-ide ready access to the man-.hole and gate, and obviate the necessity of digging a second'time.;V Y

The object of constructing the inward por- "ftionV of the section, or that portion thron-gh which the water flows immediately before strilr-v Y y interior gate opening'in the direction-of the flow, and adapted Yat its inward; po'ortionforY Y Y Y connection with a pipei'or conducting air into a line of drain-pipe at Vthe rear of lthe gate, substantially as and for the purpose set forth. Y

ing the gate, with aless diameter than that of theremainder ofthe pipe in the line, is. to reduce the friction,V and thereby'inorease theV force with which the current strikes the valve,

and to f giveV argreater depth of water in the. valves'ection than at any otherportion, so as Y 'pipe having its l opposite Vendopenings*inthe samelongitudinalplane, and-LitsV inward por-` tion contracted', of a gravity gate or valve provided withV a separate:inclinedY jamb-or Y Y Y bearing, adaptedV for insertion or removal at will, substantially as :and for the purpose set to Vinsure Vthe passing through the gate of any iioating articles Or matter carried thither by the drainage.

'By constructing the gate B and its jamb orV bearing' separate fromthe otherportion ofthe pipe-section, said gate and bearingare ren- Y dered easily removable for repair, and the dificulty of casting or molding the section with Y ears or hin ge-bearings avoided. Said gate: and its bearing mayV also be applied to an orV dinary man-hole Vsection of drain-pipe,and secured therein by cement.

Though I have shown and described this gate and bearing as constructed separate from the pipe, I may form the pipe-section with an inclined ledge and suitable ears or hinge bearings, to which the gate may be connected. And, further7 I would say that I do not confine my improvement to a man hole section of drain-pipe, though in practice I prefer to use such a section for its application. Nor am I limited to the precise arrangement of the airsupply pipe shown, as this arrangement will depend a great deal upon the locality of the line of drain-pipe.

- 'Drainfpipes have heretofore been provided with valves or gates'forthe same general pour` pose of the valve in; my invention; but, so Y far as I am aware, the section of pipe to which the gate has been applied Vhas beenV only adaptj Ved to connect two lines of pipe laid Vat different levels, said gate opening toward the lower level. Y Y Y Y VVhatIclaimis# p Y. l.V A section of sewer or drain 'pipe-provided with an interior gateor valve,and having its Y Y inner area on the outward side of said valve V0r gate'circular in crossfsection, while on the,

inward side of said :gate the Vcross'seetion of said area is elliptical, and of less transverseV diameter than the Voutward end, substantially as and for the purpose seti'orth. Y Y Y Y Y 2. Asection of drainpipe provided;` with an Y 3. The' combination, with a section of drainhave hereunto set my hand in the presence of the subscribing witnesses.

JAMES SARGENT.

' Witnesses:

Jmuns L. Nonnis, J AMEs A. RUTHERFORD. 

